Isaac van hagen



(No Model.)

I. VAN HAGEN.

MACHINE FOR COVERING STOVE BOARDS.

No. 307,605. Patented Nov. 4, 18841..

IINrrnn rarns PATENT Orrrcii ISAAC VAN HAGEN, OF CHICAGO, ILLINOIS,ASSIGNOR TO THE ADAMS & IVESTLAKE MANUFACTURING COMPANY, OF SAME PLACE.

MACHINE FOR COVERING STOVE BOARDS.

SPECIFICATION forming part of Letters Patent No. 307,605, dated November4, 1.884.

Application filed December 9, 188i. No model.)

. To aZZ whom it may concern:

Be it known that I, ISAAC VAN IIAG-EN, a citizen of the United States,residing in the city of Chicago, in the county of Cook, in the State ofIllinois, have invented certain new and useful Improvements in Machinesfor Govering Stove-Boards, which are fully set forth in the followingspecification, reference being had to the accompanying drawings, inwhich Figure l is a view of my improvements, the hand-wheel, shaft, andframe (except where the shaft passes through it) being shown inelevation and the rest in vertical section. Fig. 2 is a plan view of theshield or facing for the stove-board. Fig. 3 is a plan view of a part ofthe Sl10i3 1ll6h2il top, crimped on the margin in order to facilitatebending over the edge of the board.

The samcletters denote the same partsin all the figures.

My invention relates to apparatus for turning the sheet-metal cover of astove board or platform over the edges of the board, and particularly tomachines provided with a hollow chuck, into which. the board and itscover are set, with a shield or facing for the protection of the edgesof the board during the operation of turning the edge of the cover onthe bottom of the board, on the principle which I have set forth in anapplication for Letters Patent of the United States, filed at the sametime with this.

The invention which is the subject of the present application consistsin the particular combination of devices, which will be fully de scribedhereinafter, and definitely pointed out in the claim, the object beingto provide for bending the cover, particularly when made of tin-plate orother hard metal, 011 the bottom of the board without breaking orbruising the latter.

In the drawings, A denotes the chuck, which is of a shape and size tocontain the board 13, with an excess of breadth and depth sufficient toadmit the metal cover J also. Its rim (0 flares to correspond with theslope of the edge of the board. The chuck restson a horizontal platform,A, to which it may be secured in any convenient way. A yoke-shapedframe, A rising from this platform, affords a bear ing for theperpendicular revolving shaft F, the shaft and the hole in the framethrough which it passes being threaded, so as to admit of raising andlowering the shaft by turn ing the hand-wheel F, which is rigidly set onits upper end. has a journal-bearing in the central part of the retainerI], so as to turn freely therein, while it is rest-rained from anyvertical motion relatively to the retainer by lower collars, l and Z,which surround it i1nmediately above and below the retainer. A pin, ffastens it to the lower collar, Z. By this construction the raising andlowering of the shaft raises and lowers the retainer. retainer E isarranged horizontally, so as to be parallel and concentric with thechuck. Its precise form'is not essential, though it preferably conformsin plane outline to that of the chuck and board. cular the retainer mayadvantageously be a wheel or disk having a broad and fiat lower surfacefor the purpose of communicating a uniform pressure; but to securelightness of construction it may be partly cut away around the center,so as to consist of spokes c and a felly, 0. Its horizontal area must beso much less than that of the board B as to leave room all around theretainer for the turned margin of the cover. erably of metal,) isinterposed between the retainer and the board I3. Its lower surface isflat and its outer boundary corresponds eX- actly to that'of the lowersurface of the board Thelower part, f, of this shaft L the upper and 6The 6 5 IVhen the latter is ciro A shield or facing, II, (pref B, whichis placed uppermost when in the part j of This part o adapted to acircular board and as composed 5 of three or more separate pieces forconvenience of placing and removing. In the particular constructionshown, the two larger pieces, H, are exactly equal, each containingabout one hundred and sixty degrees of the too enter circumference. Thesmaller piece, H including about forty degrees of the outercircumference, is divided from them by two straight lines which divergevery slightly as the others are readily-.placed in their proper relativesituations.

All the parts of the apparatus are preferably made of metal.

Before being subjected to the operation of this machine the cover hasits margin crim ped and turned at an angle to the rest, equal to theinclination of the edge of the board, as shown at the right end of the.board in Fig. 1. In an application filed the same day with thisI haveshown and described means for doing this. The board is then set in thecovcr, and the two are set bottom upward in the chuck, the retainerEbeing first lifted out of the way by turning the threaded shaft F. Theshield H is then laid concentrically on the board. The retiiner E, beinglowered, presses the board smoothly into the cover. The portion 7" ofthe margin which projects beyond the oiter surface of the board is thenbent down,

by any convenient means. over the chamfered margin h of the shield H,the edge of which protects the edge of the board, and is so thin thatthe cover is fitted to the board with practical accuracy at that edge.The retainer serves to hold the shield in place during this operation.The retainer being then raised, the plates H and l-l",which compose theshield, are successively withdrawn and the margin j is pressed close onthe outer surface of the board by any convenient means. In this way acover of crystallized tin or other hard metal can be turned accuratelyand neatly under the board without any damage to'the latter.

\Vhat I claim as my invention, and desire to secure by Letters Patent isThe hollow chuck A, retainer E, and threaded shaft F, having a'ournal-bearing in. the retainer, and provided with the collars l and Z,all constructed and arranged as described, in combination with theshield H, substantially as and for the purpose specified.

ISAAC VAN HAGEN.

\Vitnesses:

JNo. O. MAcGRnGoR, M. B. GAGE.

